git.sesse.net Git - ffmpeg/blob - libavcodec/alpha/hpeldsp_alpha.c

   1 /*
   2  * Alpha optimized DSP utils
   3  * Copyright (c) 2002 Falk Hueffner <falk@debian.org>
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include "libavutil/attributes.h"
  23 #include "libavcodec/hpeldsp.h"
  24 #include "hpeldsp_alpha.h"
  25 #include "asm.h"
  26
  27 static inline uint64_t avg2_no_rnd(uint64_t a, uint64_t b)
  28 {
  29     return (a & b) + (((a ^ b) & BYTE_VEC(0xfe)) >> 1);
  30 }
  31
  32 static inline uint64_t avg2(uint64_t a, uint64_t b)
  33 {
  34     return (a | b) - (((a ^ b) & BYTE_VEC(0xfe)) >> 1);
  35 }
  36
  37 #if 0
  38 /* The XY2 routines basically utilize this scheme, but reuse parts in
  39    each iteration.  */
  40 static inline uint64_t avg4(uint64_t l1, uint64_t l2, uint64_t l3, uint64_t l4)
  41 {
  42     uint64_t r1 = ((l1 & ~BYTE_VEC(0x03)) >> 2)
  43                 + ((l2 & ~BYTE_VEC(0x03)) >> 2)
  44                 + ((l3 & ~BYTE_VEC(0x03)) >> 2)
  45                 + ((l4 & ~BYTE_VEC(0x03)) >> 2);
  46     uint64_t r2 = ((  (l1 & BYTE_VEC(0x03))
  47                     + (l2 & BYTE_VEC(0x03))
  48                     + (l3 & BYTE_VEC(0x03))
  49                     + (l4 & BYTE_VEC(0x03))
  50                     + BYTE_VEC(0x02)) >> 2) & BYTE_VEC(0x03);
  51     return r1 + r2;
  52 }
  53 #endif
  54
  55 #define OP(LOAD, STORE)                         \
  56     do {                                        \
  57         STORE(LOAD(pixels), block);             \
  58         pixels += line_size;                    \
  59         block += line_size;                     \
  60     } while (--h)
  61
  62 #define OP_X2(LOAD, STORE)                                      \
  63     do {                                                        \
  64         uint64_t pix1, pix2;                                    \
  65                                                                 \
  66         pix1 = LOAD(pixels);                                    \
  67         pix2 = pix1 >> 8 | ((uint64_t) pixels[8] << 56);        \
  68         STORE(AVG2(pix1, pix2), block);                         \
  69         pixels += line_size;                                    \
  70         block += line_size;                                     \
  71     } while (--h)
  72
  73 #define OP_Y2(LOAD, STORE)                      \
  74     do {                                        \
  75         uint64_t pix = LOAD(pixels);            \
  76         do {                                    \
  77             uint64_t next_pix;                  \
  78                                                 \
  79             pixels += line_size;                \
  80             next_pix = LOAD(pixels);            \
  81             STORE(AVG2(pix, next_pix), block);  \
  82             block += line_size;                 \
  83             pix = next_pix;                     \
  84         } while (--h);                          \
  85     } while (0)
  86
  87 #define OP_XY2(LOAD, STORE)                                                 \
  88     do {                                                                    \
  89         uint64_t pix1 = LOAD(pixels);                                       \
  90         uint64_t pix2 = pix1 >> 8 | ((uint64_t) pixels[8] << 56);           \
  91         uint64_t pix_l = (pix1 & BYTE_VEC(0x03))                            \
  92                        + (pix2 & BYTE_VEC(0x03));                           \
  93         uint64_t pix_h = ((pix1 & ~BYTE_VEC(0x03)) >> 2)                    \
  94                        + ((pix2 & ~BYTE_VEC(0x03)) >> 2);                   \
  95                                                                             \
  96         do {                                                                \
  97             uint64_t npix1, npix2;                                          \
  98             uint64_t npix_l, npix_h;                                        \
  99             uint64_t avg;                                                   \
 100                                                                             \
 101             pixels += line_size;                                            \
 102             npix1 = LOAD(pixels);                                           \
 103             npix2 = npix1 >> 8 | ((uint64_t) pixels[8] << 56);              \
 104             npix_l = (npix1 & BYTE_VEC(0x03))                               \
 105                    + (npix2 & BYTE_VEC(0x03));                              \
 106             npix_h = ((npix1 & ~BYTE_VEC(0x03)) >> 2)                       \
 107                    + ((npix2 & ~BYTE_VEC(0x03)) >> 2);                      \
 108             avg = (((pix_l + npix_l + AVG4_ROUNDER) >> 2) & BYTE_VEC(0x03)) \
 109                 + pix_h + npix_h;                                           \
 110             STORE(avg, block);                                              \
 111                                                                             \
 112             block += line_size;                                             \
 113             pix_l = npix_l;                                                 \
 114             pix_h = npix_h;                                                 \
 115         } while (--h);                                                      \
 116     } while (0)
 117
 118 #define MAKE_OP(OPNAME, SUFF, OPKIND, STORE)                                \
 119 static void OPNAME ## _pixels ## SUFF ## _axp                               \
 120         (uint8_t *restrict block, const uint8_t *restrict pixels,           \
 121          ptrdiff_t line_size, int h)                                        \
 122 {                                                                           \
 123     if ((size_t) pixels & 0x7) {                                            \
 124         OPKIND(uldq, STORE);                                                \
 125     } else {                                                                \
 126         OPKIND(ldq, STORE);                                                 \
 127     }                                                                       \
 128 }                                                                           \
 129                                                                             \
 130 static void OPNAME ## _pixels16 ## SUFF ## _axp                             \
 131         (uint8_t *restrict block, const uint8_t *restrict pixels,           \
 132          ptrdiff_t line_size, int h)                                        \
 133 {                                                                           \
 134     OPNAME ## _pixels ## SUFF ## _axp(block,     pixels,     line_size, h); \
 135     OPNAME ## _pixels ## SUFF ## _axp(block + 8, pixels + 8, line_size, h); \
 136 }
 137
 138 #define PIXOP(OPNAME, STORE)                    \
 139     MAKE_OP(OPNAME, ,     OP,     STORE)        \
 140     MAKE_OP(OPNAME, _x2,  OP_X2,  STORE)        \
 141     MAKE_OP(OPNAME, _y2,  OP_Y2,  STORE)        \
 142     MAKE_OP(OPNAME, _xy2, OP_XY2, STORE)
 143
 144 /* Rounding primitives.  */
 145 #define AVG2 avg2
 146 #define AVG4 avg4
 147 #define AVG4_ROUNDER BYTE_VEC(0x02)
 148 #define STORE(l, b) stq(l, b)
 149 PIXOP(put, STORE);
 150
 151 #undef STORE
 152 #define STORE(l, b) stq(AVG2(l, ldq(b)), b);
 153 PIXOP(avg, STORE);
 154
 155 /* Not rounding primitives.  */
 156 #undef AVG2
 157 #undef AVG4
 158 #undef AVG4_ROUNDER
 159 #undef STORE
 160 #define AVG2 avg2_no_rnd
 161 #define AVG4 avg4_no_rnd
 162 #define AVG4_ROUNDER BYTE_VEC(0x01)
 163 #define STORE(l, b) stq(l, b)
 164 PIXOP(put_no_rnd, STORE);
 165
 166 #undef STORE
 167 #define STORE(l, b) stq(AVG2(l, ldq(b)), b);
 168 PIXOP(avg_no_rnd, STORE);
 169
 170 static void put_pixels16_axp_asm(uint8_t *block, const uint8_t *pixels,
 171                                  ptrdiff_t line_size, int h)
 172 {
 173     put_pixels_axp_asm(block,     pixels,     line_size, h);
 174     put_pixels_axp_asm(block + 8, pixels + 8, line_size, h);
 175 }
 176
 177 av_cold void ff_hpeldsp_init_alpha(HpelDSPContext *c, int flags)
 178 {
 179     c->put_pixels_tab[0][0] = put_pixels16_axp_asm;
 180     c->put_pixels_tab[0][1] = put_pixels16_x2_axp;
 181     c->put_pixels_tab[0][2] = put_pixels16_y2_axp;
 182     c->put_pixels_tab[0][3] = put_pixels16_xy2_axp;
 183
 184     c->put_no_rnd_pixels_tab[0][0] = put_pixels16_axp_asm;
 185     c->put_no_rnd_pixels_tab[0][1] = put_no_rnd_pixels16_x2_axp;
 186     c->put_no_rnd_pixels_tab[0][2] = put_no_rnd_pixels16_y2_axp;
 187     c->put_no_rnd_pixels_tab[0][3] = put_no_rnd_pixels16_xy2_axp;
 188
 189     c->avg_pixels_tab[0][0] = avg_pixels16_axp;
 190     c->avg_pixels_tab[0][1] = avg_pixels16_x2_axp;
 191     c->avg_pixels_tab[0][2] = avg_pixels16_y2_axp;
 192     c->avg_pixels_tab[0][3] = avg_pixels16_xy2_axp;
 193
 194     c->avg_no_rnd_pixels_tab[0] = avg_no_rnd_pixels16_axp;
 195     c->avg_no_rnd_pixels_tab[1] = avg_no_rnd_pixels16_x2_axp;
 196     c->avg_no_rnd_pixels_tab[2] = avg_no_rnd_pixels16_y2_axp;
 197     c->avg_no_rnd_pixels_tab[3] = avg_no_rnd_pixels16_xy2_axp;
 198
 199     c->put_pixels_tab[1][0] = put_pixels_axp_asm;
 200     c->put_pixels_tab[1][1] = put_pixels_x2_axp;
 201     c->put_pixels_tab[1][2] = put_pixels_y2_axp;
 202     c->put_pixels_tab[1][3] = put_pixels_xy2_axp;
 203
 204     c->put_no_rnd_pixels_tab[1][0] = put_pixels_axp_asm;
 205     c->put_no_rnd_pixels_tab[1][1] = put_no_rnd_pixels_x2_axp;
 206     c->put_no_rnd_pixels_tab[1][2] = put_no_rnd_pixels_y2_axp;
 207     c->put_no_rnd_pixels_tab[1][3] = put_no_rnd_pixels_xy2_axp;
 208
 209     c->avg_pixels_tab[1][0] = avg_pixels_axp;
 210     c->avg_pixels_tab[1][1] = avg_pixels_x2_axp;
 211     c->avg_pixels_tab[1][2] = avg_pixels_y2_axp;
 212     c->avg_pixels_tab[1][3] = avg_pixels_xy2_axp;
 213 }